A New York Times editor who worked on Pulitzer-winning pandemic coverage has died of a heart attack just one day after he shared on Instagram that he had received the COVID-19 vaccine booster.

Carlos Tejada, the deputy Asia editor for the Times, was 49 years old when he passed away in a hospital in Seoul, Korea, on Dec. 17.

On Dec. 16, he posted to Instagram a photo of himself after getting the booster.